Unit 6: Open Economy: International Trade and Finance

📚Study Guide: Open Economy: International Trade and Finance

Unit 6: Open Economy—International Trade and Finance

Overview: In an increasingly interconnected global economy, understanding international trade and finance is essential for comprehensive macroeconomic analysis. This unit begins with the balance of payments, a record of all economic transactions between residents of a country and the rest of the world. The balance of payments consists of the current account, which tracks trade in goods and services, income receipts and payments, and unilateral transfers, and the capital and financial account, which records the purchase and sale of financial assets and real capital. By accounting identity, the current account and the capital and financial account must sum to zero, meaning a country running a current account deficit must simultaneously run a capital and financial account surplus as foreign capital flows in. The foreign exchange market is the marketplace where currencies are traded, and exchange rates are determined by the supply and demand for currencies. Currency appreciation occurs when a currency's value rises relative to another currency, making imports cheaper and exports more expensive; depreciation has the opposite effects. The unit covers the impact of changes in relative interest rates, price levels, and income on exchange rates. Trade barriers, specifically tariffs and quotas, are analyzed for their effects on domestic prices, quantities, consumer surplus, producer surplus, and overall economic welfare, including the creation of deadweight loss. Students must understand that while tariffs generate government revenue, quotas may not unless the government auctions import licenses. The relationship between net exports and net capital outflow is also emphasized: a trade deficit must be financed by a net inflow of foreign capital.

Key Concepts

• Balance of Payments: A record of all economic transactions between the residents of a country and foreign residents. It is divided into the current account and the capital and financial account.
• Current Account: Records trade in goods and services (net exports), investment income, and net transfers. A current account deficit means a country imports more goods, services, and capital income than it exports.
• Capital and Financial Account: Records the flow of financial assets and direct investment. A surplus here indicates that foreign residents are buying more domestic assets than domestic residents are buying foreign assets.
• Exchange Rates: The price of one currency in terms of another currency, determined by supply and demand in the foreign exchange market.
• Currency Appreciation: An increase in the value of a currency relative to another currency. Appreciation makes imports less expensive and exports more expensive in foreign markets.
• Currency Depreciation: A decrease in the value of a currency relative to another currency. Depreciation makes exports cheaper abroad and imports more expensive domestically.
• Tariffs and Quotas: A tariff is a tax on imported goods that raises domestic prices and generates government revenue. A quota is a legal limit on the quantity of a good that can be imported, raising domestic prices but not generating revenue unless licenses are sold.
• Net Capital Outflow: The purchase of foreign assets by domestic residents minus the purchase of domestic assets by foreigners. Net exports must equal net capital outflow.

Vocabulary

• Balance of Payments: The comprehensive record of a country's economic transactions with the rest of the world.
• Trade Surplus: A situation in which a country exports more than it imports.
• Trade Deficit: A situation in which a country imports more than it exports.
• Foreign Exchange Market: The market in which currencies are bought and sold.
• Appreciation: An increase in the market value of one currency relative to another.
• Depreciation: A decrease in the market value of one currency relative to another.
• Tariff: A tax imposed by a government on imported goods or services.
• Quota: A government-imposed limit on the quantity of a good that can be imported.
• Foreign Direct Investment (FDI): The purchase of physical assets such as factories and equipment in a foreign country.
• Portfolio Investment: The purchase of financial assets such as stocks and bonds in a foreign country.

Essential Formulas and Graphs

• Balance of Payments Identity: Current Account + Capital/Financial Account = 0
• Net Exports (X - M) = Net Capital Outflow
• Graph: Foreign exchange market with the exchange rate (price of domestic currency in terms of foreign currency) on the vertical axis and quantity of domestic currency on the horizontal axis. Show shifts in supply or demand for currency.

Common Mistakes

• Confusing the current account with the capital and financial account. The current account covers trade and income; the capital/financial account covers asset transactions.
• Believing that a trade surplus is always beneficial and a trade deficit is always harmful. Trade deficits can reflect strong domestic investment opportunities that attract foreign capital.
• Confusing currency appreciation with depreciation. Remember that appreciation makes imports cheaper, which tends to increase the trade deficit.
• Forgetting that the balance of payments must always sum to zero. A current account deficit is automatically matched by a capital and financial account surplus.

AP Exam Strategies

• When analyzing exchange rate changes, identify the specific cause: higher domestic interest rates attract foreign capital, increasing demand for the domestic currency and causing appreciation.
• On the foreign exchange graph, always label the axes as the price of the domestic currency (in terms of foreign currency) and the quantity of the domestic currency.
• For tariffs, show the increase in domestic price, the decrease in imports, the increase in domestic quantity supplied, the decrease in domestic quantity demanded, and the deadweight loss triangles.
• Remember that protectionist policies such as tariffs and quotas benefit domestic producers but harm domestic consumers and create deadweight loss for society.

Real-World Applications

• US Current Account Deficit: The United States has run persistent current account deficits because it attracts massive foreign investment in Treasury securities and corporate assets, financing its consumption and government spending.
• China's Currency Management: For years, China intervened in foreign exchange markets to keep the yuan undervalued, promoting exports but creating trade tensions with the United States and other trading partners.
• Brexit and the Pound: Following the UK's vote to leave the European Union in 2016, the British pound depreciated sharply against the dollar and euro as investors anticipated weaker economic growth and political uncertainty.